Airplane



FIG. 1 is a top plan view of an airplane showing my new design;

FIG. 2 is a side elevational view thereof, with the opposite side being identical;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof, with the engines in an alternate position; and

FIG. 6 is a front elevational view of the airplane of FIG. 5.

The bottom of the airplane not shown is unornamented. 

The ornamental design for an airplane, substantially as shown and described. 